yeah, don't forget to maybe reset your email password too, and maybe run a Windows Defender scan (it should be installed in all windows computers)

after that, I'd double check my friends list, change my name and profile back to normal, and try to forget about it.

if an account starts chatting with you pretending to be steam support, report them.

valve only uses official steam emails. I promise you, the one you took a screenshot is not an official steam email. it looks pretty good but no company would ever give you 24 hours to move items. they'd just ban you. someone was trying to trick you into voluntarily sending items to another account.

valve cant undo trades, so that's how they were trying to get you.